How to: Enable the TAB Key to Move Out of a ToolStrip Control
Use the following procedure to enable the user to press the TAB key to move out of a ToolStrip to the next control in the tab order.
The ToolStrip accepts the first press of the TAB key, and the arrow keys select items within the ToolStrip. When the user presses the TAB key a second time, it takes the user to the next control in the tab order.